Coronet Industries ceased operations in March 2004.

While the mining operations stopped sometime in the mid-20th century, the 980-acre facility just south of Plant City continued as a manufacturer of Defluorinated Phosphate, a key nutritional supplement used by farmers to raise poultry, turkey, cattle and swine. The plant had the capacity to manufacture 250,000 tons of Defluorinated Phosphate annually.

While the mining operations stopped sometime in the mid-20th century, the 980-acre facility just south of Plant City continued as a manufacturer of Defluorinated Phosphate, a key nutritional supplement used by farmers to raise poultry, turkey, cattle and swine. The plant had the capacity to manufacture 250,000 tons of Defluorinated Phosphate annually.